PROBLEM TO BE SOLVED: To provide a wheel alignment measuring method capable of highly precisely, simply and inexpensively measuring a toe angle, a total toe, a slice angle, a caster angle, and a kingpin inclination angle for each wheel of a vehicle at a discretionary place.SOLUTION: Strings are stretched to vehicle body side faces in parallel with each other, and angles between the strings and the respective wheels, and angles between the strings and lines formed by connecting from front wheels to rear wheels are measured so as to associate the right and left and angle relationship among the strings, the wheels and the vehicle body and obtains toe angles of the respective wheels with respect to a vehicle straight travel direction. Horizontal distances from the strings to respective points of the wheels are precisely measured using a vernier scale. A camber angle and a steering angle in straight travel and in applying two steering angles are measured using the fact that one point on a wheel axis moves on one plane in steering, with a kingpin axis used as a normal vector, calculates coordinates and applies them to an equation of a plane to calculate the normal vector, thereby calculating a caster angle and a kingpin inclination angle.SELECTED DRAWING: Figure 1
【課題】任意の場所で、車両の各車輪個別のトー角、トータルトー、スラストアングル、キャスター角、キングピン傾斜角を高精度で、簡単、安価に測定できるホイールアライメント測定方法を提供する。【解決手段】車体側面に糸を平行に張り、それらの糸と、各ホイールとの角度、および前輪から後輪を結ぶ線との角度を測定することで、左右の関連付けと、糸とホイールと車体の角度関係の把握を行い、車両直進方向に対する各車輪のトー角を得る。糸からホイール各点までの水平距離はバーニヤ目盛りを用いて精密に測定する。車輪軸上の1つの点は転舵時にキングピン軸を法線ベクトルとする1つの平面上を移動することを利用して、直進時と2つの転舵角を与えた時のキャンバー角と転舵角を測定し、座標を算出し平面の方程式に適用して法線ベクトルを算出し、キャスター角およびキングピン傾斜角を算出する。【選択図】図1
WHEEL ALIGNMENT MEASURING METHOD
ホイールアライメント測定方法
2016-05-23
Patent
Electronic Resource
Japanese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen |
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